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Print Version
Frequency and Total Duration of Display of Tropical Cyclone Warning Signals : 1956-2007
Year
Signals
Total Duration
1
3
8 NW
8 SW
8 NE
8 SE
9
10
hr
min
1956
5
4
0
0
0
0
0
0
191
25
1957
4
9
1
1
2
2
0
1
295
45
1958
4
5
0
0
1
0
0
0
214
5
1959
1
1
0
0
0
0
0
0
36
35
1960
11
7
0
2
2
2
1
1
432
35
1961
6
7
1
2
1
0
1
1
192
55
1962
4
3
0
1
1
0
1
1
158
10
1963
4
5
0
0
1
0
0
0
175
50
1964
11
14
1
3
5
3
3
2
570
15
1965
7
6
0
0
1
1
0
0
239
40
1966
6
5
0
0
2
2
0
0
284
40
1967
8
6
0
0
2
1
0
0
339
10
1968
7
7
0
1
1
0
1
1
290
10
1969
4
2
0
0
0
0
0
0
110
15
1970
6
8
2
1
2
0
0
0
286
45
1971
9
10
1
3
2
2
1
1
323
25
1972
8
6
0
0
1
1
0
0
288
20
1973
8
6
1
1
1
0
1
0
416
50
1974
12
10
0
0
2
1
1
0
525
20
1975
8
6
1
0
0
1
1
1
292
20
1976
6
6
0
0
1
2
0
0
351
30
1977
8
6
0
0
1
0
0
0
395
10
1978
8
9
1
1
3
2
0
0
462
10
1979
5
5
1
0
2
2
1
1
281
15
1980
10
8
0
0
1
1
0
0
414
5
1981
5
4
0
0
1
1
0
0
202
20
1982
7
4
0
0
0
0
0
0
247
35
1983
8
7
0
1
2
2
1
1
289
42
1984
6
6
0
0
1
0
0
0
280
2
1985
5
4
1
0
0
1
0
0
193
35
1986
6
7
0
1
1
0
0
0
305
0
1987
6
1
0
0
0
0
0
0
165
45
1988
6
4
0
0
0
0
0
0
204
10
1989
7
8
0
0
2
2
0
0
306
10
1990
6
4
0
0
0
0
0
0
245
10
1991
8
6
0
0
1
1
0
0
349
55
1992
5
5
0
0
1
1
0
0
167
5
1993
8
9
0
0
2
4
0
0
325
40
1994
4
3
0
0
0
0
0
0
138
10
1995
8
6
2
2
1
1
0
0
348
50
1996
7
2
0
0
0
1
0
0
189
0
1997
2
3
0
1
1
0
1
0
97
30
1998
5
2
0
0
0
0
0
0
188
35
1999
10
13
4
3
2
0
2
1
520
0
2000
7
3
0
0
0
0
0
0
329
5
2001 6 6 1 1 2 1 0 0 253 35
2002 3 2 0 0 0 1 0 0 144 25
2003 4 5 1 1 1 1 1 0 158 0
2004 3 2 1 1 1 0 0 0 77 35
2005 3 1 0 0 0 0 0 0 142 45
2006 10 3 0 0 0 0 0 0 317 50
2007 4 3 0 1 0 0 0 0 86 50
Total 329 284 20 28 54 40
17
12
13842

59

Mean
6.3
5.5
0.4
0.5
1.0
0.8
0.3
0.2
266
13

 

 2003 | Important notices | Privacy policy Last revision date: <18 Jun 2008>